I know my code can handle 2007 format as I have sucessfully uploaded some. However, when I upload a large file (30MB) I get the external table is not in correct format error.

What is really weird is if I upload the same file in excel 2003 format it works. So I know it is not the maxupload size that is the problem. I had read that the permissions of the temporaryinternbet files folder could be an issue but then why would it work with 2003?

If I remove a large portion of the data from the 2007 version of the file (leaving the number of columns in tact) the connection works so I must be hitting a size threshold but I can't figure out what setting I need to change.

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